(1):登陆验证功能 (2):客户通过服务器转发实现聊天功能 (3):实时显示目前其它用户的状态 (4):易用美观的图形界面 -(1) : A landing certification function (2) : client server transmitted through the chat function (3) : real-time display of the current state of other users (4) : easy-to-use gra